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C3 White Board Backed Envelopes are the perfect choice for sending A3 sized documents or flat prints through the post whilst ensuring they’re kept flat whilst in transit. These C3 white board backed envelopes comprise a 1000-micron rigid backing board to ensure your important items are kept flat, and a strong 120gsm white plain paper front to keep your mail lightweight. The peel and seal adhesive strip closure keeps packing fast and gives a strong and reliable seal with no need for additional adhesives. Our C3 white board backed envelopes are an excellent eco-friendly solution; completely plastic free, fully recyclable and biodegradable. Supplied in boxes for easy handling and neat storage.
Please note: C3 size is up to 324 x 458mm, designed to fit A3 sized items of 297 x 420mm.